Perpetual calendar.



J VOGEL.

PERPETUAL CALENDAR. APPLICATION FILED JULY 26, 1913.

1,083,381. Patented Jan.6, 1914.

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JOHN VOGEL, OF ZEELAND, MICHIGAN.

PERPETUAL CALENDAR.

" Specification of Letters Patent.

Patented Jan. 6, 1914.

Application filed July 26. 1913. Serial No. 781,427.

To all whom it may concern:

Be it known that I, J OHN VocEL, citizen of the Netherlands, Europe,residing at Zeeland, in the county of Ottawa and State of Michigan, haveinvented certain new and useful Improvements in Perpetual Calendars, ofwhich the following is a specification, reference being had to theaccompanying drawings.

This invention relates to perpetual calendars and has for its primaryobject to pro vide a very simple device of this character whereby theweek day in any year may be ascertained.

Another and more specific object of the invention resides in theprovision of two relatively rotatable parts one of which is providedwith an annular series of openings and an anular series of lettersindicating a plurality of week days, the other of said parts havingprinted or otherwise delineated thereon the names of the months and themonth numerals, and an indicator adapted for adjustment in said openingsand with respect to which the desired month is adapted to be disposedwhereby the month numer als will be properly disposed with relation tothe letters indicating the Week days.

A further object of the invention is to produce a perpetual calendarwhich is simple in its construction, may be manufactured at small costand is highly serviceable and etlicient in practical use.

With the above and other objects in view as will become apparent as thedescription proceeds, the invention consists of certain constructions,combinations and arrangements of the parts that I shall hereinafterfullydescribe and claim.

For a full understanding of the invention, reference is to be had'to thefollowing description and accompanying drawing, in which Figure 1 is anelevation of a perpetual calendar embodying the preferred form of myinvention; and Fig. 2 is a diametrical section thereof.

Referring in detail to the drawing, 5 designates a disk which may beconstructed of heavy card board or other material, and 6 indicates asecond disk of smaller diameter which is superposed upon said firstnamed an opening 9 to receive a nail or hook whereby the device may besuspended from a wall. Upon the edge of the outer larger disk 5, aplurality of spaced finger pieces 10 are secured whereby said disk maybe conveniently rotated.

Upon the upper surface of the disk 5 adjacent to its edge, an annularseries of numerals indicated at 11 are printed or otherwise delineated,said numerals indicating the days of a plurality of weeks, and inwardlyof said numerals and adjacent thereto this disk is. provided with anannular series of perforations 12 which correspond in number to thenumber of Week days. Upon the other or smaller disk 6, at the edgethereof, the names of the months are printed as indicated at 13, thesame being arranged radially with respect tothe center I of the disk.This disk is also provided upon its edge with the month numerals 14which are adapted to be disposed with relation tothe week days 11 uponthe disk 5 as will be more fully disclosed in the following description.

15 designates an indicator or pointer to one end of which a pin 16 isfixed. This pointer, it will be noted, when arranged in position, isdisposed over the surface of the disk 6. 1

As an example of the operation of the device, assuming that it isdesired to ascertain the calendar for the month of February 1913, thepointer 0r indicator 15 is arranged upon the disk 6 in line with one ofthe letters F in the edge of said disk, indicating Friday. The pointerremains in this position for the entire year, the disk 6 being rotatedwith respect thereto to dispose any one of the months in line therewith.The numerals 14 upon the edge of the disk 6 will then be disposedopposite the proper week day designations upon the edge of the disk 5and disclose all of the calendar days for the month of February. Witheach succeeding year, the pointer or indicator 15 is moved upon the disk5 to a position in line with the next succeeding week day indicatedthereon, the pin 16 being inserted through the proper opening 12. Uponthe 0ccurrence of leap year, in which year a day is added to the monthof February, on the first of March the pointer 15 is advanced and thepin 16 inserted through the next adjacent opening in the disk oppositethe next succeeding day of the week,

From the foregoing, it is believed that the the device will be clearlyand fully understood.

The invention is extremely simple, may

serviceable and convenient in use.

The blank space upon the face of the disk 6 may contain advertisingmatter 1f desired.

While I have shown and described the preferred construction andarrangement of the several parts, it will be understood that theinvention is susceptible of considerable modification in the form,proportions and arrangements of the several elements without departingfrom the essential features or sacrificing any of the advantagesthereof.

Having thus described the invention, what is claimed is:

1. A perpetual calendar comprising two disks of relatively differentdiameters and rotatable with respect to each other, the larger diskbeing provided adjacent its periphery with letters indicating the daysof a plurality of weeks, the smaller disk having the names of the monthsand the numerals indicating the days of a month printed thereon, anindicating pointer, and means for removably attaching said pointer tothe larger disk to extend inwardly from one of the week day indicationsthereon, and adapted to be disposed over the month indication on thesmaller disk, whereby the month numerals on the latter disk and the weekday designations on the larger disk are disposed in proper relation todisclose the calendar for the month indicated by said pointer.

2. A perpetual calendar comprising two superposed relatively rotatabledisks of dif ferent diameters, the larger disk being provided upon itsedge with spaced projections whereby the same may be rotated and havingprinted upon one surface an annular series of letters indicating thedays of a plurality of weeks, said disks being further provided inwardlyof said letters and 0pi posite to each of them with an opening, the

smaller disk having printed thereon the months of the year and thenumerals indieating the days of an entire month, a pointer, and a pin onone end of said pointer for insertion in one of the openings in thelarger disk and projecting inwardly from one of the week days indicatedthereon over the smaller disk whereby the same may be located withrespect to the month names upon said smaller disk, when the disks arerotated to position the month numerals upon said smaller disk in properrelation to the week days on the larger disk to disclose the calendarfor the month indicated by said pointer.

3. A perpetual calendar comprising two disks of relatively differentdiameters rotatable with respect to each other, one of said disks beingprovided with letters indicating the days of a plurality of weeks, theother disk having the names of the months and numerals indicating thedays of a month printed thereon, an indicating pointer, and means forrem'o-vably attaching said pointer to the first named disk opposite anyone of the letters thereon, said disks being adapted to be relativelymoved to dispose any one of the months on the second named disk in linewith said pointer whereby the month numerals on said disk are properlyrelated to the week day designations on the first named disk to disclosethe calendar for the month indicated by said pointer.

In testimony whereof I hereunto aiiix my signature in the presence oftwo witnesses;

JOHN VOGIQL.

Witnesses THOMAS KEPPEL, B. NEERKEN.

flopiea of this patent may be obtained for five cents each, byaddressing the Gommlssioner of Patents, Washington, D. C.

